Cisco 6851 Administration Guide

CONTENTS
New and Changed Information 1
CHAPTER 1
New and Changed for Firmware Release 11.2(4) 1
New and Changed for Firmware Release 11.2(3)SR1 2
New and Changed for Firmware Release 11.2(3) 2
New and Changed for Firmware Release 11.2(2) 4
New and Changed for Firmware Release 11.2(1) 5
New and Changed for Firmware Release 11.1(2) 6
New and Changed for Firmware Release 11.1(1) 7
About the Cisco IP Phone 9
PART I
Technical Details 11
CHAPTER 2
Physical and Operating Environment Specifications 11
Cable Specifications 12
Network and Computer Port Pinouts 13
Network Port Connector 13
Computer Port Connector 13
Phone Power Requirements 14
Power Outage 15
Power Reduction 16
Power Negotiation Over LLDP 16
Network Protocols 16
VLAN Interaction 20
External Devices 20
Cisco IP Phone Hardware 23
CHAPTER 3
Cisco IP Phone 6800 Series Multiplatform Phones Administration Guide
iii

Cisco 6851 Specifications

General

Network Protocols	SIP
Speakerphone	Yes
Bluetooth	No
Wi-Fi	No
USB Port	No
Display	3.5 inch grayscale display (396 x 162 pixels)
Ethernet	10/100 Ethernet
PoE	IEEE 802.3af
Audio	Wideband audio
Line Keys	4
Headset Port	RJ9
Supported Codecs	G.711, G.722, G.729, iLBC
Weight	0.9 kg